Rotary edge cutter

Abstract

A herbage trimmer has a larger, toothed rotatable cutting blade provided with a circular array of bosses. A smaller, toothed rotatable cutting blade lies flat against the larger blade and is positioned within the tooth tip circle of the larger blade so that some of its teeth overlap with some of the teeth of the larger blade. The bosses on the larger blade are in gear-tooth relationship with the teeth of the smaller blade so that the blades counter-rotate to produce a continuous shearing action between the over-lapping teeth of the blades.

I claim: 
     
       1. A herbage trimmer comprising a larger, toothed rotatable cutting blade, a smaller, toothed rotatable cutting blade lying flatly against the larger blade and positioned within the tooth tip circle of the larger blade such that some of its teeth overlap with some of the teeth of the larger blade, a plurality of bosses on said larger blade disposed in circular array concentric with said larger blade and in gear-tooth relationship with the teeth of the smaller blade such that counter clock-wise rotation of the larger blade effects clockwise rotation of the smaller blade, thereby producing a continuous shearing action between those teeth of the two blades overlapping for the time being. 
     
     
       2. A herbage trimmer according to claim 1 for trimming lawn edges, said trimmer having a wheel secured to the larger blade to rotate said larger blade in response to movement of the trimmer with said wheel in contact with a lawn edge strip.